Aircraft with forward opening inlay spoilers for yaw control

B - Operations – Transporting – 64 – C

Patent

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Details

B64C 5/08 (2006.01) B64C 1/00 (2006.01) B64C 9/32 (2006.01) B64C 9/34 (2006.01) B64C 39/10 (2006.01) B64D 7/00 (2006.01)

Patent

CA 2514825

An aircraft (50) comprises first (68) and second (70) wings positioned on opposite sides of a longitudinal axis, a first forward opening control surface (52) attached to an upper surface of the first wing (68), and a second forward opening control surface (54) attached to an upper surface of the second wing (70) , wherein each of the first (56) and second hinges (58) is canted (01, 02) with respect to a direction perpendicular to a longitudinal axis of the aircraft. A method of providing yaw control of an aircraft is also provided. The method comprises the steps of providing a first forward opening, canted spoiler in a top surface of a first wing of the aircraft, providing a second forward opening, canted spoiler in a top surface of a second wing of the aircraft, and operating the first and second spoilers differentially to create a yaw moment. The creation of yaw moments without any down force has application in sweptback wings where the tips are behind the center of gravity of the aircraft. The advantage is in reducing radar cross section over traditional (forward hinged, rearward opening) spoilers where there must be a spoiler on the bottom side to counter the down force created by the top spoiler.

La présente invention concerne un aéronef comprenant une première et une seconde aile disposées de part et d'autre d'un axe longitudinal, un premier volet ouvrant vers l'avant et monté sur le dessus de la première aile, et un second volet ouvrant vers l'avant monté sur le dessus de la seconde aile, selon un axe formant un angle de fuite par rapport à l'axe longitudinal de l'aéronef. L'invention concerne également un procédé de commande de lacet, procédé pour lequel on monte en dessus de la première aile de l'aéronef un premier volet d'aérofrein orienté selon un angle de fuite et ouvrant vers l'avant, puis en dessus d'aile de l'aéronef un second volet d'aérofrein orienté selon un angle de fuite et ouvrant vers l'avant, la commande des deux volets se faisant de façon différenciée de pour créer un moment de lacet. La création de moments de lacet sans force descendante convient à des ailes en flèche dont les pointes se trouvent derrière le centre de gravité de l'aéronef. Par rapport aux aérofreins conventionnels qui s'articulent à l'avant et ouvrent vers l'arrière, l'avantage en est de réduire la section efficace du diagramme de gain, sans qu'on ait besoin de volet de dessous d'aile pour contrer la force descendante créée par le volet de dessus d'aile.

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